A 10×10 concrete slab (100 sq ft) averages $900 to $1,500 installed by a contractor ($9 to $15 per square foot), or $350 to $550 if you mix and pour it yourself using bagged concrete or a small ready-mix short load. 10×10 is the most popular dimension for storage sheds, hot tub pads, garbage can pads, and backyard BBQ patios.
A 10×10 slab poured 4 inches thick contains 1.23 cubic yards before waste. With the standard 10% allowance used by this page, plan for 1.36 cubic yards, or about 82 60-lb bags or 62 80-lb bags. That quantity is close to the point where a short-load ready-mix delivery may be easier than hand mixing, so compare both options below using local prices.
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Range breakdown
| Component | Low | Average | High |
|---|---|---|---|
| Base installation | - | - | - |
| Thickness adjustment | - | - | - |
| Finish adjustment | - | - | - |
| Calculated subtotal | - | - | - |
10×10 Concrete Slab Cost Breakdown (100 Sq Ft)
| Project Type | Thickness | Bagged DIY Cost | Contractor Turnkey Price |
|---|---|---|---|
| Storage Shed Foundation | 4 inches | $380 – $500 | $900 – $1,400 |
| Hot Tub / Heavy Spa Pad | 5 to 6 inches | $520 – $700 | $1,200 – $1,800 |
| Small Patio / BBQ Area | 4 inches (Broom) | $400 – $550 | $1,000 – $1,500 |
| Stamped Decorative Patio | 4 inches (Stamped) | $650 – $900 | $1,400 – $2,200 |
Bagged Concrete vs. Ready-Mix for a 10×10 Slab
- Bagged Concrete (60 lb Bags): About 82 bags including 10% waste. Example material cost: about $533 at $6.50 per bag, before mixer rental and delivery.
- Bagged Concrete (80 lb Bags): About 62 bags including 10% waste. Example material cost: about $465 at $7.50 per bag.
- Ready-Mix Delivery (1.5 cu yd): ~$250 material + $100 delivery + $150 short-load fee = ~$500 total. Delivered in 15 minutes with zero hand mixing.
Worked Quantity Check for a 10×10 Slab
The volume before waste is 10 ft × 10 ft × (4 in ÷ 12) ÷ 27 = 1.23 cu yd. Applying a 10% allowance gives 1.36 cu yd. Dividing 36.67 cubic feet by a nominal bag yield of 0.45 cubic feet (60-lb) or 0.60 cubic feet (80-lb), then rounding up, gives 82 or 62 bags. Always substitute the yield printed on the mix you plan to buy.
What Changes for a Shed, Spa, or Patio
- Shed: Check the shed maker’s anchoring, edge-distance, and slab-size instructions before forming the pad.
- Hot tub: Use the filled operating weight, equipment pad requirements, electrical clearances, drainage, and frost conditions—not the tub’s empty weight.
- Patio: Plan drainage away from the house, door-sill clearance, control joints, and the final surface texture.
Frequently Asked Questions About 10×10 Slabs
How many bags of concrete do I need for a 10×10 slab?
A 4-inch-deep 10×10 slab contains 1.23 cubic yards before waste. With a 10% allowance, order approximately 82 bags of 60-lb concrete or 62 bags of 80-lb concrete. Bag yield varies by product, so confirm the yield printed on the package before buying.
How thick should a 10×10 slab be for a shed vs a hot tub?
Four inches is common for many small shed slabs. A hot-tub pad may need 5 to 6 inches and reinforcement, but the final specification depends on the filled spa weight, soil, base preparation, local code, and manufacturer instructions. Confirm the design with the spa manufacturer and a qualified local professional.
Can I pour a 10×10 concrete slab myself?
It may be manageable for an experienced DIY crew, but 62 to 82 bags is a large continuous placement. Compare mixer capacity, crew size, weather, finishing time, and short-load ready-mix charges before deciding. Concrete begins setting while later batches are still being mixed.
Related Tools
- Concrete Slab Cost Calculator (Any Size)
- Concrete Patio Calculator
- Ready-Mix Price Per Yard Guide
- Rebar Quantity Calculator
Sources and Update Policy
Figures are updated monthly from public retail and supplier pricing. The calculator’s base installed-price reference is ConcreteNetwork’s concrete price guide. Read our estimation methodology for the calculation and review process.
Estimate transparency
How this estimate was prepared
- Prepared by
- GoHomeCost Cost Data Team
- Last reviewed
- August 24, 2026
- Update cycle
- Public price inputs checked monthly
Calculation method: Project quantity is multiplied by editable low, typical, and high unit rates. Selected location adjustments, waste, fixed charges, and minimum-job rules are then applied and shown in the result.
Public references used on this page:
This is a planning estimate, not a quote or structural specification. Check product yields, local code, site conditions, and written contractor bids before purchasing materials or building.
Read the full methodology Report a price or calculation issue